James hudson



(No Model.)

J. HUDS DRAW PL No. 569,336. Patented 0011.13, 1896.

UNITED STATES PATENT Trice.

JAMES HUDSON, OF BIRMINGHAM, ENGLAND.

D RAW- PLATE.

SPECIFICATION forming part of Letters Patent No. 569,335, dated October 13,1896.

Application filed May 11, 1896.

To ctZZ whom it may concern.-

Be it known that 1, JAMES HUDsoN, a citizen of Great Britain, and a resident of 187 Monument Road, in the city of Birmingham, England, have invented a certain new and useful Improvement in the Manufacture of Tubes, of which the following is a specification.

This inventionrelates to an improvement in the manufacture of tubes, my object being to provide simple and effective means for removing the tube from the drawing-down bar, after the metal has been reduced to the required gage or thickness, without bruising or damaging either the bar or the tube.

In order that my invention maybe the more readily understood, I append one sheet of explanatory drawings, to be hereinafter referred to.

Figure 1 is a front elevation, Fig. 2 an end elevation, and Fig. 3 a plan, illustrating my tube-withdrawing appliance. Figs. 4 and 5 are sectional views, to a larger scale, of the tube and bar, illustrating the process of withdrawal.

The same reference-letters in the different views indicate the same parts.

I place the tube requiring to be drawn down upon a bar of any ordinary form and draw both tube and bar together through the die upon a tube-bench or like machine arranged in the usual manner. After the tube and bar have been thus drawn together through the die I remove the ordinary die and die-block from its working position and replace it with the withdrawing-block A, having a die in ounted therein.

The withdrawingdie is formed in two parts B B, and I provide screws 0 C for the purpose of adjustment. The adjacent edges of the parts 13 B of the die do not touch or meet, being kept apart by the distance-pieces D D, but a space cl d is left at each side of the die, as illustrated at Fig. 1. Lateral or side movement of the die parts B B and the distance-pieces D D is prevented by the ribs E E The front edges of the die parts B B are well rounded to admit the tube, and the longi- Serial No. 591,100. (No model.)

On drawing the tube F and bar G through the withdrawingdie the top and bottom portions of the tube-metal in contact with the die are subjected to compression, and such compression forces the sides of the tube into the spaces (1 d between the die parts, thus forming the projections or excrescences f f, as at Fig. 4. After the tube has been thus once drawn completely through the em tractor-die I slightly increase the diameter of the die by adjustment of the screws 0 O, and I then again draw the tube and bar through the die, but with the projections or excrescences f f in contact with the die parts. Such second drawing of the tube and bar through the withdrawing die returns the tube to its circular section, as shown at Fig. 5, and at the same time sufiiciently loosens the tube as to permit of its ready withdrawal from the bar G.

Having thus described my invention, I declare that what I claim, and desire to secure byLetters Patent, is

1. In combination, in means for removing tubes from mandrels, a pair of non-rotary dies having curved bearing-surfaces and arranged with laterally-extending openings between them, and distance-pieces in said openings between the dies, substantially as described.

2. The combination of ablock A fitted with adjustmentscrews O O, of the two die parts B B having distance-pieces D D interposed between them and with spaces d cl on each side, substantially as set forth.

I11 witness whereof I have hereunto set my hand in presence of two witnesses.

JAMES HUDSON. Witnesses:

EDWARD MARKS, HERBERT BowKnTr. 

